205240086 has 24 divisors (see below), whose sum is σ = 464022000. Its totient is φ = 65438736.

The previous prime is 205240067. The next prime is 205240093. The reversal of 205240086 is 680042502.

205240086 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 247461 + ... + 248288.

It is an arithmetic number, because the mean of its divisors is an integer number (19334250).

Almost surely, 2^205240086 is an apocalyptic number.

205240086 is an abundant number, since it is smaller than the sum of its proper divisors (258781914).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

205240086 is a wasteful number, since it uses less digits than its factorization.

205240086 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495780 (or 495777 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 205240086 is about 14326.2027767305. The cubic root of 205240086 is about 589.8669488353.

Adding to 205240086 its reverse (680042502), we get a palindrome (885282588).

The spelling of 205240086 in words is "two hundred five million, two hundred forty thousand, eighty-six".